December 27 was one wild night for Miley as she flirted, danced and shared smooches with both sexes. The fun part is that the singer's wild antics were all caught on cam!

The 21-year old was caught flirting with several guys at the Beacher's Madhouse in Las Vegas. Miley was especially invited to the opening party having had celebrated her birthday there.

The singer did not disappoint and showed up wearing a long-sleeved super cropped light beige top with overall-like black skirt. The ensemble displayed her show-worthy belly and most of her legs.

Miley arrived at the venue with assistant Cheyne Thomas, who seemed to have enjoyed flirting, grinding and kissing the "Adore You" singer. The former Disney star's wild antics did not end with Cheyne as she was spotted feeling up a bow-tied guy in a denim shirt minutes after.

The singer also appeared to have kissed Hercules Kellan Lutz on the neck during the opening party. The two looked very cozy and were spotted almost always within arm's reach from each other.

"Miley was having so much fun at Beacher's," Hollywood Life's Insider exclusively reports.

"Kellan and Miley were talking although she seemed more into being the life of the party. It looked like Miley and Kellan ended up leaving together though."

The "Adore You" singer's wild Vegas night went on as she watched one of her heroes, Britney Spears' opening act for her Las Vegas residency. Miley sat at no less than the front row during the pop princess' "Piece of Me" performance - singing Britney's songs from her seat.

And when one of the "Piece of Me" singer's female dancers neared Miley, the 21-year-old flirtatiously grinded with her stopping only for a smooch with a second female dancer who somehow managed to wander off in her way.

Coincidence? The Mirror reports that Miley actually talked to Spears' dancers backstage for some awesome grinding moment during the performance. It was not mentioned if the kiss was planned though. Watch the hot kiss in the video below!